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    <title>首页</title>
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</head>

<body class="application application-offset">
    <div class="container-fluid container-application">
        <div class="sidenav show" id="sidenav-main">
            <!-- Sidenav header -->
            <div class="sidenav-header d-flex align-items-center">
                <a class="navbar-brand" href="./index.html">
                    <span class="logo">·ITCAST·</span>
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            <!-- User mini profile -->
            <div class="sidenav-user d-flex flex-column align-items-center justify-content-between text-center">
                <!-- Avatar -->
                <div>
                    <a href="#" class="avatar rounded-circle avatar-xl">
                        <img alt="Image placeholder" src="https://yanxuan-item.nosdn.127.net/8b27deb1670c53e67c42ca3e1ed6fd12.jpg" class="" />
                    </a>
                    <div class="mt-5">
                        <h5 class="mb-0 text-white">黑马前端</h5>
                        <span class="d-block text-sm text-white opacity-8 mb-3">数据可视化</span
              >
              <a
                href="javascript:;"
                class="btn btn-sm btn-white btn-icon rounded-pill shadow hover-translate-y-n3"
              >
                <span class="btn-inner--text">学前端来黑马</span>
                        </a>
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            <!-- Application nav -->
            <div class="nav-application clearfix">
                <a href="./index.html" class="btn btn-square text-sm active">
                    <span class="btn-inner--icon d-block"><i class="bi bi-house bi-2x"></i
            ></span>
                    <span class="btn-inner--icon d-block pt-2">首页</span>
                </a>
                <a href="./student.html" class="btn btn-square text-sm">
                    <span class="btn-inner--icon d-block"><i class="bi bi-people bi-2x"></i
            ></span>
                    <span class="btn-inner--icon d-block pt-2">学生</span>
                </a>
                <a href="javascript:;" class="btn btn-square text-sm">
                    <span class="btn-inner--icon d-block"><i class="bi bi-columns bi-2x"></i
            ></span>
                    <span class="btn-inner--icon d-block pt-2">排版</span>
                </a>
                <a href="javascript:;" class="btn btn-square text-sm">
                    <span class="btn-inner--icon d-block"><i class="bi bi-files bi-2x"></i
            ></span>
                    <span class="btn-inner--icon d-block pt-2">资料</span>
                </a>
                <a href="javascript:;" class="btn btn-square text-sm">
                    <span class="btn-inner--icon d-block"><i class="bi bi-receipt bi-2x"></i
            ></span>
                    <span class="btn-inner--icon d-block pt-2">就业</span>
                </a>
                <a href="javascript:;" class="btn btn-square text-sm">
                    <span class="btn-inner--icon d-block"><i class="bi bi-gear bi-2x"></i
            ></span>
                    <span class="btn-inner--icon d-block pt-2">设置</span>
                </a>
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            <!-- Misc area -->
            <div class="card bg-gradient-warning">
                <div class="card-body">
                    <h5 class="text-white">哈喽, 朋友!</h5>
                    <p class="text-white mb-4">
                        为什么不现在开始学习前端，创造一些令人惊叹的东西呢？
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                    <a href="http://itcast.cn" class="btn btn-sm btn-block btn-white rounded-pill" target="_blank">Get started</a
            >
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        <nav
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          id="navbar-main"
        >
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            <!-- Navbar nav -->
            <div
              class="collapse navbar-collapse navbar-collapse-fade"
              id="navbar-main-collapse"
            >
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                <!-- Home  -->
                <li class="nav-item">
                  <a class="nav-link pl-lg-0" href="./index.html"> 首页 </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link pl-lg-0" href="./index.html"> 传智教育 </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link pl-lg-0" href="./index.html">
                    黑马程序员
                  </a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link pl-lg-0" href="./index.html"> 文档 </a>
                    </li>
                    </ul>
                    <!-- Right menu -->
                    <ul class="navbar-nav ml-lg-auto align-items-center d-none d-lg-flex">
                        <li class="nav-item dropdown dropdown-animate">
                            <a class="nav-link pr-lg-0" href=".dropdown-menu" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                <div class="media media-pill align-items-center">
                                    <span class="avatar rounded-circle">
                        <img
                          alt="Image placeholder"
                          src="https://yanxuan-item.nosdn.127.net/8b27deb1670c53e67c42ca3e1ed6fd12.jpg"
                        />
                      </span>
                                    <div class="ml-2 d-none d-lg-block">
                                        <span class="mb-0 text-sm font-weight-bold" id="usernameText">Admin</span
                        >
                      </div>
                    </div>
                  </a>
                </li>
                <li class="nav-item">
                  <a class="nav-link pl-lg-0" id="logout" href="javascript:;">
                    退出
                  </a>
                </li>
              </ul>
            </div>
          </div>
        </nav>
        <div class="page-content">
          <!-- Page Title -->
          <div class="page-title">
            <div class="row justify-content-between align-items-center">
              <div class="col-md-6 mb-3 mb-md-0">
                <h5 class="h3 font-weight-400 mb-0 text-white">Dashboard</h5>
                <span class="text-sm text-white opacity-8">上海前端 xx 期</span>
                                    </div>
                                </div>
                </div>
                <!-- charts -->
                <div class="row">
                    <div class="col-xl-3 col-md-6">
                        <div class="card card-stats">
                            <div class="card-body">
                                <div class="row">
                                    <div class="col">
                                        <h6 class="text-muted mb-1">就业薪资</h6>
                                        <span name="salary" class="h3 font-weight-bold mb-0">15500</span
                      >
                    </div>
                    <div class="col-auto">
                      <i class="bi bi-coin"></i>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="col-xl-3 col-md-6">
              <div class="card card-stats">
                <div class="card-body">
                  <div class="row">
                    <div class="col">
                      <h6 class="text-muted mb-1">班级人数</h6>
                      <span
                        name="student_count"
                        class="h3 font-weight-bold mb-0"
                        >80</span
                      >
                    </div>
                    <div class="col-auto">
                      <i class="bi bi-people"></i>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="col-xl-3 col-md-6">
              <div class="card card-stats">
                <div class="card-body">
                  <div class="row">
                    <div class="col">
                      <h6 class="text-muted mb-1">平均年龄</h6>
                      <span name="age" class="h3 font-weight-bold mb-0"
                        >24.40</span
                      >
                    </div>
                    <div class="col-auto">
                      <i class="bi bi-calendar2-week"></i>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <div class="col-xl-3 col-md-6">
              <div class="card card-stats">
                <!-- Card body -->
                <div class="card-body">
                  <div class="row">
                    <div class="col">
                      <h6 class="text-muted mb-1">小组个数</h6>
                      <span name="group_count" class="h3 font-weight-bold mb-0"
                        >8</span
                      >
                    </div>
                    <div class="col-auto">
                      <i class="bi bi-collection"></i>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
          <div class="row">
            <div class="col col-xl-8">
              <div class="card" id="line" style="height: 400px"></div>
            </div>
            <div class="col col-xl-4">
              <div class="card" id="salary" style="height: 400px"></div>
            </div>
            <div class="col col-xl-12">
              <div class="card" style="height: 400px">
                <div class="card-header">
                  <div
                    class="d-flex justify-content-between align-items-center"
                  >
                    <h6 class="mb-0">班级每组薪资</h6>
                    <div id="btns">
                      <button type="button" class="btn btn-xs btn-blue">
                        1
                      </button>
                      <button type="button" class="btn btn-xs">2</button>
                      <button type="button" class="btn btn-xs">3</button>
                      <button type="button" class="btn btn-xs">4</button>
                      <button type="button" class="btn btn-xs">5</button>
                      <button type="button" class="btn btn-xs">6</button>
                      <button type="button" class="btn btn-xs">7</button>
                      <button type="button" class="btn btn-xs">8</button>
                    </div>
                  </div>
                </div>
                <div class="card-body p-0" id="lines"></div>
              </div>
            </div>
            <div class="col col-xl-4">
              <div class="card" id="gender" style="height: 500px"></div>
            </div>
            <div class="col col-xl-8">
              <div class="card" id="map" style="height: 500px"></div>
            </div>
          </div>
          <!-- footer -->
          <div class="footer pt-5 pb-4 footer-light" id="footer-main">
            <div class="row text-center text-sm-left align-items-sm-center">
              <div class="col-sm-6">
                <p class="text-sm mb-0">
                  © 2022
                  <a href="https://itcast.cn" class="h6 text-sm" target="_blank"
                    >前端学科</a
                  >. All rights reserved.
                </p>
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              <div class="col-sm-6 mb-md-0">
                <ul class="nav justify-content-center justify-content-md-end">
                  <li class="nav-item">
                    <a class="nav-link" href="#">Support</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="#">Terms</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link pr-0" href="#">Privacy</a>
                  </li>
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